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Chemistry

Electrochemistry

Key Points

  • Cathode: negative electrode, reduction (gain of electrons)
  • Anode: positive electrode, oxidation (loss of electrons)
  • Faraday 1st Law: m ∝ Q = It
  • Rusting requires both water AND oxygen
  • Reactivity series: K > Na > Ca > Mg > Al > Zn > Fe > Cu > Ag > Au

Practice Questions

3 questions
1

During electrolysis, reduction occurs at the:

2

Which metal is used for galvanising iron to prevent rusting?

3

In the electrolysis of dilute sulphuric acid, what is produced at the cathode?

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